u_lindemo.m

标准svm3.0程序 内有mex优化程序

echo off
%LINDEMO demonstration for using linear SVM classifier.
echo on; 

clc
%LINDEMO demonstration for using linear SVM classifier.
%##########################################################################
%
%   This is a demonstration script-file for contructing and testing a linear
%   SVM-based classifier using OSU SVM CLASSIFIER TOOLBOX. 
%
%##########################################################################

pause % Strike any key to continue (Note: use Ctrl-C to abort)

clc
%##########################################################################
%
%   Load the training data and examine the dimensionity of the data
%
%##########################################################################
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% load the training data
clear all
load DemoData_train

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% take a look at the data, and please pay attention to the dimensions 
% of the input data 
who

size(Labels) 
size(Samples)

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clc
%##########################################################################
%
%   Construct a linear SVM classifier using the training data
%
%##########################################################################
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% Constructing using the most simple format.
% By using this format, the default values of u, Epsilon, CacheSize
% are used. That is, u=0.5, Epsilon=0.001, and CacheSize=45MB
[AlphaY, SVs, Bias, Parameters, nSV, nLabel]=u_LinearSVC(Samples, Labels);


% End of the SVM classifier construction 
%
% The resultant SVM classifier is jointly determined by 
%  "AlphaY", "SVs", "Bias", "Parameters", and "Ns".
%

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% Save the constructed linear SVM classifier 
save SVMClassifier AlphaY SVs Bias Parameters nSV nLabel;

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clc
%##########################################################################
%
%   Test the constructed linear SVM Classifier
%
%##########################################################################
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% Load the constructed linear SVM classifier
clear all
load SVMClassifier

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% have a look at the variables determining the SVM classifier
who

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% load test data
load DemoData_test

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% Test the constructed SVM classifier using the test data
% begin testing ...
[ClassRate, DecisionValue, Ns, ConfMatrix, PreLabels]= SVMTest(Samples, Labels, AlphaY, SVs, Bias,Parameters, nSV, nLabel);
% end of the testing

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% The resultant confusion matrix of this 4-class classification problem is:
ConfMatrix

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